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This week over 60,000 people will attend COP 29, the 29th gathering of the Conference of the Parties dealing with climate change.
In contrast, 39 years ago a small group of 100 scientists met in the small town of Villach in Austria to begin talks on climate change which in effect was, in the minds of many people, the original pre-runner of the COP meetings.
So 39 years on, what has changed. Of the many climate science meetings I have been to, the most significant, at least in terms of climate change, was the UN sponsored International Conference held in the beautiful town of Villach, Austria.
One hundred experts from 30 countries attended the meeting (in contrast to the sixty to eighty thousand plus who now attend such meetings), and I was privileged to be the only New Zealander invited.
We were all there as experts - and not representing our respective organisations - in various fields of science, endeavouring to do the best we could in looking at the complexities of climate change and climate science.
This conference predated by three years the establishment of the Intergovernmental Panel on Climate Change (IPCC) established by the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP). The first session of the IPCC was held in Geneva in November 1988.
Among the principal findings of the 1985 Villach Conference was that "while other factors, such as aerosol concentration, changes in solar energy input, and changes in vegetation, may also influence climate, greenhouse gases are likely to be the most important cause of climate change over the next century”.
At that time, even though I was partly responsible for the writing of the above paragraph, I along with some of my colleagues, had some misgivings about this phrase, and in particular the almost overall emphasis on greenhouse gases compared with the natural causes of climate change, and in particular the role of the oceans, the sun , and the volcanoes.
These natural causes of climate change are discussed at length in my new book 'Climate Change: Nature is in control". (available from Amazon).
Additionally, my 1986 book "'The Uncertainty Business : Risks and Opportunities in Weather and Climate” focused on the opportunities provided to humanity in regards to all aspects of the climate... whether it be cold or hot, or wet or dry, or something in-between.
Nevertheless, within a year of the 1985 Villach Conference ‘human-induced global warming' caught the imagination of much of the world. Indeed today, not an hour goes by without some mention of ‘global warming', 'climate change', 'emission trading scheme's etc., all terms which up until 1980's were the preserve of academic text books.
Thirty ears ago, it was inconceivable that any Government in the world would have a 'Minister of Climate Change”; indeed back then, as weather forecasters and climatologists we just got on with our job of making the best possible weather forecast and providing the best climate advice to all those who requested information, without guidance or interference from the government of the day.
How things have changed is evident in the continuing series of COP meetings.
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For further information about a wide range of weather/climate matters see my new book Climate Change : Nature is in control" The book is available through the web site amazon.com.